Provides standardized color palettes for clinical trial visualizations, following industry conventions for treatment group representation.
Arguments
- type
Character string specifying the type of clinical palette. Options: "treatment" (standard treatment colors), "severity" (condition severity), "outcome" (positive/negative outcomes), "fda" (FDA submission), or journal-specific palettes: "nejm", "nature", "lancet", "jama", "science", "jco". Default is "treatment".
- n
Integer specifying the number of colors needed. If not specified, returns the full palette.
- placebo_first
Logical. If TRUE, places placebo color first in treatment palettes. Default is TRUE.
Details
Clinical color palettes follow these conventions:
Treatment: Placebo in neutral grey, active treatments in distinct colors
Severity: Progression from mild (light) to severe (dark)
Outcome: Green for positive, red for negative, grey for neutral
FDA: High contrast colors for regulatory submissions
Journal-specific palettes (based on ggsci package):
NEJM: New England Journal of Medicine official colors
Nature: Nature Publishing Group colors (Nature Reviews Cancer)
Lancet: Lancet journal colors (Lancet Oncology)
JAMA: Journal of the American Medical Association colors
Science: Science journal (AAAS) colors
JCO: Journal of Clinical Oncology colors
All palettes maintain distinction in grayscale printing and follow accessibility guidelines.
Examples
# Standard treatment palette
colors <- clinical_colors("treatment", n = 3)
# Severity progression
severity_colors <- clinical_colors("severity", n = 5)
# Journal-specific palettes
nejm_colors <- clinical_colors("nejm", n = 4)
nature_colors <- clinical_colors("nature", n = 4)
lancet_colors <- clinical_colors("lancet", n = 4)
# Use in plot
df <- data.frame(
visit = rep(1:4, 60),
efficacy = rnorm(240),
treatment = rep(c("Placebo", "Drug 10mg", "Drug 20mg"), each = 80)
)